Mark Webber says the long runs during Friday practice suggest Sunday's Australian Grand Prix "will be a little bit open".

Sebastian Vettel set the pace in both free practice sessions and Webber backed his team-mate up to leave Red Bull first and second in the FP2 standings. However, Webber was keen to focus on the lap times when drivers were on high fuel in the afternoon, and said all the indications were that it would be a competitive grand prix.

"I think the next 48 hours [will be tricky]; we've seen today with the long runs the race will be a little bit open if it's dry and also qualifying will probably have a bit of a mixed grid tomorrow given the conditions we'll face," Webber said. "So a lot of decisions when we're running on circuit in the next few days, that's for sure, and we need to get as many of those right to get the maximum result."

Webber added that Red Bull's day had been a good one but he was aware of areas where the team could make progress.

"It was actually not a bad day; we got through plenty of info. It was nice to have a bit of sun on the circuit having been in Barcelona with plenty of overcast conditions. So we had to correlate a lot of information from Europe and that went pretty well, still an absolutely huge amount to go through tonight - we're expecting quite a bit of overcast stuff tomorrow so have to be ready for that - and overall a pretty positive day for us but still areas to improve on."

The International Rugby Board (IRB) have stripped Australia of the right to host a round of the World Sevens Series, scheduled for Brisbane on 16-17 February, after the Australian government's refusal to provide visas for the squad from Fiji